An exact Wh is not going to be possible. They are all estimates. A battery is not like a gas tank.

LeafSpy uses two different ways to calculate Wh used. One is based on a change in Gids and the other is based on battery energy level changes.

Wh per Gid is not a precise number. The default is 77.5 Wh per Gid but you can change that in Settings/Battery. Also Gids when SOC is high seem to have less energy than Gids when SOC is low. After a full change the first bar goes away pretty quickly compared to later in the drive.

The Battery energy level has <1Wh resolution which looks great but a battery can change its available energy just by having the battery temperature increase or decrease. Battery energy level changes also includes all accessory energy use.

LeafSpy's efficiency number (energy/distance) has the problem of energy listed above plus the fact that the odometer only changes in 1 km steps. It is not something I would have put in but was requested even with the short comings.

An exact Wh is not going to be possible. They are all estimates. A battery is not like a gas tank.

LeafSpy uses two different ways to calculate Wh used. One is based on a change in Gids and the other is based on battery energy level changes.

Wh per Gid is not a precise number. The default is 77.5 Wh per Gid but you can change that in Settings/Battery. Also Gids when SOC is high seem to have less energy than Gids when SOC is low. After a full change the first bar goes away pretty quickly compared to later in the drive.

The Battery energy level has <1Wh resolution which looks great but a battery can change its available energy just by having the battery temperature increase or decrease. Battery energy level changes also includes all accessory energy use.

LeafSpy's efficiency number (energy/distance) has the problem of energy listed above plus the fact that the odometer only changes in 1 km steps. It is not something I would have put in but was requested even with the short comings.

Ok, thanks for answer.Which meter is more accurate for energy/distance? on board meter or LeafSpy kw/km meter? I mean LeafSpy. But both showing consmuption with all accesory, yes?

calverajarda wrote:Which meter is more accurate for energy/distance? on board meter or LeafSpy kw/km meter? I mean LeafSpy. But both showing consmuption with all accesory, yes?

How granular do you want the data? Do you need a separate readout for each trip/day, or is a month long summary (possibly without many digits of precision) acceptable?

I think in general LeafSpy will give you more accurate (and precise) readings, especially if you are trying to track at the trip or daily level. But you would need to remember to run it each and every time if you are looking to gather data on a larger scale (like a month). For that, I think relying on the car's display is probably adequate. My routine is as follows:

On the first day of the month I note the various parameters in the driver's display (averge mi/kWh, distance, average mph, driving time) and reset all those. Taken across a whole year you can see variations due to seasons, and even the effect of battery degradation and things like different tires, etc.

Each time I charge the car I reset the center console meter. This was actually more useful in my old 2012 LEAF in that it was basically a daily activity, and the center console displayed the daily efficiency as a number--in my 2016 it only shows as a bar graph, plus I don't need to charge my 2016 daily, so the information it conveys is not as useful anyway. The idea behind this is that I could check daily efficiency and compare to the monthly running total and surrounding days, correlating with weather conditions and driving patterns (highway vs. surface streets).

The resultant data is not precise. You only get down to the 0.1 mi/kWh level, but big picture wise, this is probably sufficient accuracy for what I was using the data for.

If for some reason I needed highly accurate data for a particular trip, I would have no qualms using LeafSpy for that.

If you need highly accurate data for some other reason (you are trying to calculate exact costs of electricity), then you probably want to take a different approach altogether and put a meter on your EVSE so you can take into account charger losses as well.

An exact Wh is not going to be possible. They are all estimates. A battery is not like a gas tank.

LeafSpy uses two different ways to calculate Wh used. One is based on a change in Gids and the other is based on battery energy level changes.

Wh per Gid is not a precise number. The default is 77.5 Wh per Gid but you can change that in Settings/Battery. Also Gids when SOC is high seem to have less energy than Gids when SOC is low. After a full change the first bar goes away pretty quickly compared to later in the drive.

The Battery energy level has <1Wh resolution which looks great but a battery can change its available energy just by having the battery temperature increase or decrease. Battery energy level changes also includes all accessory energy use.

LeafSpy's efficiency number (energy/distance) has the problem of energy listed above plus the fact that the odometer only changes in 1 km steps. It is not something I would have put in but was requested even with the short comings.

Ok, thanks for answer.Which meter is more accurate for energy/distance? on board meter or LeafSpy kw/km meter? I mean LeafSpy. But both showing consmuption with all accesory, yes?

I think another way to understand the situation;

This is how I know when its time to change the remote access keypad battery for my garage. When the keypad fails and its Winter time ( Have yet to have it fail during Summer and I am an OLLLLD guy!)

I pull the battery out and rub it between my palms for about a minute. This heats up the battery enough to where it is able to power up and initiate the garage door opener. When I get tired of doing this, I change the battery!